نتایج جستجو برای: walled section

تعداد نتایج: 171928  

Journal: :American Journal of Engineering and Applied Sciences 2023

In order to calculate the equivalent torsional-warping stiffness of Reinforced Concrete (RC) cores that have thin-walled open cross-section, a new analytical methodology, which combines Vlasov torsion theory with Bernoulli bending theory, is presented herein. As basis calculations, we use principal elastic reference system core from this consider known. Furthermore, start point core's exact sec...

حاج آقازاده, محمد, شاه طاهری, سید جمال الدین, صبور یراقی, علی اکبر, محمدیان, یوسف, کاکویی, حسین,

Background and aim: In this study the cytotoxicity to human epithelial lung cells of single-walled carbon nanotubes, multi-walled carbon nanotubes and chrysotile was compared based on the following cytotoxicity indices: no observable adverse effect concentration (NOAEC), inhibitory concentration 50 (IC50), and Total Lethal Concentration (TLC). Materials and Methods: Human epithelial lung cells...

2017
Ilya Mazov Vladimir Kuznetsov Anatoly Romanenko Valentin Suslyaev

Journal: :Nanoscale 2011
Julie Russier Cécilia Ménard-Moyon Enrica Venturelli Edmond Gravel Gabriele Marcolongo Moreno Meneghetti Eric Doris Alberto Bianco

In this study we compare the biodegradation of both single-walled (SWCNTs) and multi-walled carbon nanotubes (MWCNTs) using two different oxidative conditions. In particular, we demonstrate that oxidized multi-walled carbon nanotubes are highly degraded, although not to completeness when treated with horseradish peroxidase (HRP) in the presence of hydrogen peroxide.

2007
Erik Einarsson Takahisa Yamamoto Yuichi Ikuhara Shigeo Maruyama

In this study, we investigated the internal structure of ’as-grown’ vertically aligned single-walled carbon nanotube (VA-SWNT) films by cross-sectional transmission electron microscopy (TEM). The VA-SWNTs were produced by the alcohol catalytic CVD method [1, 2], and transferred onto a TEM grid using a hot water technique [3]. The resulting freestanding VA-SWNT film was observed along the alignm...

2008
BARRY J. COX NGAMTA THAMWATTANA

The discovery of carbon nanotubes and C60 fullerenes has created an enormous impact on possible new nanomechanical devices. Owing to their unique mechanical and electronic properties, such as low weight, high strength, flexibility and thermal stability, carbon nanotubes andC60 fullerenes are of considerable interest to researchers frommany scientific areas. One aspect that has attracted much at...

2005
Myung Jin Chung Kyung Soo Lee Won-Jung Koh Ju Hyun Lee Tae Sung Kim O Jung Kwon Seonwoo Kim

We aimed to compare the CT findings of nontuberculous mycobacterial pulmonary diseases caused by Mycobacterium avium-intracellulare complex (MAC) and Mycobacterium abscessus. Two chest radiologists analyzed retrospectively the thin-section CT findings of 51 patients with MAC and 36 with M. abscessus infection in terms of patterns and forms of lung lesions. No significant difference was found be...

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